“Our thoughts and prayers go out to the victims of these tragic storms,” Devon CEO John Richels said. “We are all saddened by the devastation, and as fellow Oklahomans, we want to do what we can to help our neighbors.”

Devon and Continental announced Tuesday each has committed $2.5 million toward relief efforts.

Chesapeake pledged $1 million Monday night to the American Red Cross, while promising to lend its employees and equipment to the relief effort.

“Our hearts go out to the victims of these terrible storms, and Chesapeake and our employees are doing all we can to aid in the disaster recovery efforts in our hometown community,” Chesapeake Chairman Archie Dunham said. “We are providing all possible assistance using Chesapeake equipment, machinery and resources and many of our people are already mobilized under the Operation Blue banner and assisting in the rescue efforts.”

The OGE Energy Corp. Foundation said it will commit $500,000 to relief efforts after a deadly tornado struck Moore on Monday afternoon.

“On behalf of our 3,500 employees, I want to offer our deepest condolences to families who have been affected by the storm,” OGE CEO Pete Delaney said. “We are deeply saddened by the enormous loss of life.”

SandRidge Energy Inc. is doing its part as well.

“SandRidge is currently collecting donated items, providing food and drinks for relief workers and working with our partner agencies in various ways, including identifying current and future volunteer opportunities,” spokesman Greg Dewey said. “We are also providing financial support to relief organizations and helping our employees who have been personally impacted.”